unit 1 global challenges

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  • Created on: 04-05-13 08:45
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Geography Unit 1
Global challenges
Hydrometeorological ­ water/weather
Geophysical ­ Earth movements
Geomorphological - both hydrometeorological and geophysical
Hazard ­ a perceived natural event which has the potential to threaten both
life and property
Vulnerability ­ a high risk combined with an inability of individuals and
communities to cope
Disaster ­ hazard becoming a reality in an event that causes deaths and
damage to goods, property and the environment
Risk ­ probability of a hazard event occurring and creating loss of lives
and livelihoods
Techno-hazard ­ e.g. Transport accident, industrial explosion

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Super hazard ­ e.g. super volcano
Chronic hazard ­ don't stem from one event e.g. famine, climate change
Natural hazard ­ caused by Hydrometeorological and geophysical processes
Na tech ­ natural hazard caused by humans e.g. desertification, smog
Concerns over reliability
1. No agreed definition of disaster
2. No agreed numerical threshold for designating an event as a disaster
3. Are the deaths direct or indirect?
4. Location can make it hard to get true number of deaths
5.…read more

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Landslides
Weather patterns, deforestation, melting permafrost in high mountainous areas, and high and
increasing human pollution densities are important factors in the cause distribution, number, extent
and effects of landslides.
Landslide hotspots
SW India
Sri Lanka
China
Philippines
Caribbean islands
Indonesia
Mexico, Chile and south America
Volcanoes
Mountain formed from solidified lava from different eruptions. Lava that flows out can come from 30
­ 60 km from inside the Earth.…read more

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Climate mitigation ­ action to permanently eliminate long term risks and hazards of climate change
to human life e.g. CO2 emissions
Climate Adaption ­ adjust to climate change to moderate potential damage/ cope with
consequences e.g. houses on stilts
CLIMATE TIMESCALES
1. Long term - has occurred on geological timescale over several hundreds of thousands to
millions of years. Evidence from ice cores
2. Medium term - historical changes over last few thousand years. Evidence from
thermometers and rain gauges
3.…read more

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